2021 HONDA ACCORD SEDAN Owner's Manual (in English)

455Continued
Driving
Honda Sensing®
Honda Sensing® is a driver support system which employs the use of three distinctly
different kinds of sensors: a radar sensor located at the lower part of the front
bumper, a front sensor camera mounted to the interior side of the windshield,
behind the rearview mirror, and the sonar sensors located in the front and rear
bumpers.
Honda Sensing ® is a driver support system which employs the use of two distinctly
different kinds of sensors: a radar sensor located at the lower part of the front
bumper and a front sensor camera mounted to the interior side of the windshield,
behind the rearview mirror.
Honda Sensing ® has following functions.
■The functions which do not requir e switch operations to activate
• Collision Mitigation Braking SystemTM (CMBSTM) 2 P. 458
• Low Speed Braking Control* 2 P. 467
• Road Departure Mitigation (RDM) System 2 P. 496
• Traffic Sign Recognition System 2 P. 500
■The functions wh ich require switch operations to activate
• Adaptive Cruise Control (ACC) with Low Speed Follow
2 P. 472
• Lane Keeping Assist System (LKAS) 2 P. 488
Models with Low Speed Braking Control
Models without Low Speed Braking Control
* Not available on all models

456
uuHonda Sensing ®u
Driving
■ Button
Press to activate standby mode for ACC with
Low Speed Follow. Or press to cancel the
system.
■LKAS Button
Press to activate standby mode for LKAS. Or
press to cancel the system.
■RES/+ and SET/- Buttons
Press RES/+ button to resume the ACC with
Low Speed Follow or increase the vehicle
speed.
Press SET/− button to set the ACC with Low
Speed Follow or decrease the vehicle speed.
■Interval Button
Press to change the ACC with Low Speed
Follow following-interval.
■CANCEL Button
Press to cancel ACC with Low Speed Follow.
■Operation Switches for the ACC with Low Speed Follow/
LKAS
button
Interval
Button
CANCEL
Button
LKAS Button
RES/+ Button
SET/- Button

457
uuHonda Sensing ®u
Driving
You can see the current state of ACC with
Low Speed Follow and LKAS.
aIndicates that ACC with Low Speed Follow
is ready to be activated.
• White: The system is standby.
• Green: The system is on.
• Amber: There is a problem with the system.
bIndicates that LKAS is ready to be activated.
• White: The system is standby.
• Green: The system is on.
• Amber: There is a problem with the system.
cIndicates that LKAS is activated and
whether or not traffic lane lines are
detected.
• Solid line: The system is on.
• Contour line: The system is in standby.
dIndicates whether or not ACC with Low
Speed Follow detects the vehicle ahead.
eShows vehicle set sp eed in ACC with Low
Speed Follow.
fShows set vehicle interval in ACC with Low
Speed Follow.
■Driver Information Interface Content1 Driver Information Interface Content
You can have the head-up display show you the
current state of each function.
2 Head-Up Display
* P. 159
Models with head-up display
6
* Not available on all models

458
uuHonda Sensing ®u Collision Mitigation Braking SystemTM (CMBSTM)
Driving
Collision Mitigati on Braking SystemTM (CMBSTM)
Can assist you when there is a possibility of your vehicle colliding with a vehicle or a
pedestrian detected in front of yours. The CMBSTM is designed to alert you when the
potential for a collision is determined, as well as to reduce your vehicle speed to help
minimize collision severity when a collision is deemed unavoidable.
■How the system works
1 Collision Mitigation Braking SystemTM (CMBSTM)
Important Safety Reminder
The CMBS
TM is designed to reduce the severity of an
unavoidable collision. It does not prevent collisions
nor stop the vehicle automati cally. It is still your
responsibility to operate th e brake pedal and steering
wheel appropriately acco rding to the driving
conditions.
The CMBS
TM may not activate or may not detect a
vehicle in front of y our vehicle under certain
conditions: 2 CMBS
TM Conditions and Limitations P. 462
For directions on the prop er handling of the radar
sensor, refer to the following page. 2 Radar Sensor P. 508
You can read about handling information for the
camera equipped with this system. 2 Front Sensor Camera P. 506
When the CMBS
TM activates, it may automatically
apply the brake. It will be canceled when your vehicle
stops or a potential collision is not determined.
The radar sensor is at the
lower part of the front
bumper.
The camera is located
behind the rearview
mirror.
The system starts monitoring the roadway ah ead when your vehicle speed is about
3 mph (5 km/h) and there is a vehicle in front of you.
When to use
The CMBSTM activates when:●The speed difference between your vehicle and a vehicle or pedestrian detected in
front of you becomes about 3 mph (5 km/h) and over with a chance of a collision.
●Your vehicle speed is about 62 mph (100 km/h) or less and the system determines
there is a chance of a collision with:
- Vehicles detected in front of you that ar e stationary, oncoming, or traveling in your
same direction.
- A pedestrian who is detected in front of you.
●Your vehicle speed is above 62 mph (100 km/h), and the system determines there
is a chance of a collision with a vehicle detected in front of you traveling in your
same direction.

Continued459
uuHonda Sensing ®u Collision Mitigation Braking SystemTM (CMBSTM)
Driving
■When the system activates
You can change the distance ( Long/Normal /Short ) between vehicles at which the
system's earliest collision alert will come on through audio/information screen
setting options.
2 Customized Features P. 352
1When the system activates
The camera in the CMBS
TM is also designed to detect
pedestrians.
However, this pedestrian detection feature may not
activate or may not detect a pedestrian in front of
your vehicle under certain conditions.
Refer to the ones indicating the pedestrian detection
limitations from the list. 2 CMBS
TM Conditions and Limitations P. 462
The head-up warning uses a lens located at the front
end of the dashboard.
Do not cover the lens or spill any liquid on it.
Models with head-up display
Lens
The system provides visual and audible alerts of a possible collision, and stops if the
collision is avoided.
u Take appropriate action to prevent a collision (apply the brakes, change
lanes, etc.).
Beep Head-up
Warning
Lights
*
Visual Alerts
Audible Alert
* Not available on all models

460
uuHonda Sensing ®u Collision Mitigation Braking SystemTM (CMBSTM)
Driving
The system has three alert stages for a possible collis ion. However, depending on circumstances, the CMBSTM may not go through all of
the stages before initiating the last stage.
■Collision Alert Stages
Distance between vehiclesCMBSTM
The radar sensor detects a vehicleAudible & Visual WARNINGSBraking
Stage oneThere is a risk of a collision with the
vehicle ahead of you.
When in Long, visual and audible alerts come
on at a longer distance from a vehicle ahead
than in Normal setting, and in Short, at a
shorter distance than in Normal.
—
Stage
twoThe risk of a collision has increased,
time to respond is reduced.
Visual and audible alerts.
Lightly
applied
Stage three The CMBSTM determines that a
collision is unavoidable.Forcefully applied
Your Vehicle Vehicle Ahead
Normal
Short
Long
Your Vehicle Vehicle Ahead
Your
Vehicle Vehicle
Ahead

Continued461
uuHonda Sensing ®u Collision Mitigation Braking SystemTM (CMBSTM)
Driving
When you turn the CMBSTM on and off, do the
following.
1. Press the safety support switch.
2. Roll the left selector wheel to the
symbol and push it.
u The message appears on the driver
information interface when the system
becomes on or off.
The CMBS
TM is turned on every time you start
the engine, even if you turned it off the last
time you drove the vehicle.
■CMBSTM On and Off1 CMBSTM On and Off
The CMBS
TM may automatically shut off, and the
safety support indicator (amb er) will come and stay
on under certain conditions:
2 CMBS
TM Conditions and Limitations P. 462
When the CMBS
TM is activated, it will continue to
operate even if the accele rator pedal is partially
depressed. However, it w ill be canceled if the
accelerator pedal is fully depressed.
The Vehicle Stability Assist
TM (VSA ®) system, Vehicle
Stability AssistTM (VSA ®) OFF, adaptive cruise control
(ACC) with Low Speed Follow, safety support and
low tire pressure/TPMS indicators may come on in
amber along with a message in the driver information
interface when you set the power mode to ON after
reconnecting the battery.
Drive a short distance at more than 12 mph (20 km/h).
Each indicator should go off. If any do not, have your
vehicle checked by a dealer.
Left Selector Wheel
Safety Support Switch

uuHonda Sensing ®u Collision Mitigation Braking SystemTM (CMBSTM)
462
Driving
The system may automatically shut off and the safety support indicator (amber) will
come on under certain conditions. Some ex amples of these conditions are listed
below. Other conditions may reduce some of the CMBS
TM functions.
2 Front Sensor Camera P. 506
2 Radar Sensor P. 508
■Environmental conditions
• Driving in bad weather (rain, fog, snow, etc.).
• Sudden changes between light and dark, such as an entrance or exit of a tunnel.
• There is little contrast between objects and the background.
• Driving into low sunlight (e.g., at dawn or dusk).
• Strong light is reflected onto the roadway.
• Driving in the shadows of trees, buildings, etc.
• Roadway objects or structures are misint erpreted as vehicles and pedestrians.
• Reflections on the interi or of the windshield.
• Driving at night or in a dark place such as a tunnel (due to low-light conditions,
pedestrians or other vehicles may not be detected).
■Roadway conditions
• Driving on a snowy or wet roadway (obs cured lane marking, vehicle tracks,
reflected lights, road spray, high contrast).
• Driving on curvy, winding, or undulating roads.
• The road is hilly or the vehicle is approaching the crest of a hill.
■CMBSTM Conditions and Limitations1Collision Mitigation Braking SystemTM (CMBSTM)
Have your vehicle checked by a dealer if you find any
unusual behavior of the system (e.g., the warning
message appears too frequently).